Overall, Thoreau wanted to prove that not everyone will easily flow with the rules of society. As a result, he calls the people who go different paths than the ones of society "different drummers."
In conclusion, your final answer should be A.
The main mechanism by which this might have or could have happened is through increases in the desire to increase monetary gain. Because the main driver of capitalism is an increase in sold goods when a country increases its land this inadvertently makes the country more likely to earn more money through opening companies.
The answer to your question is A) Therefore.
D A conclusion reached on the basis of evidence
